First Lunetta Module - Advice Needed

[xiwi]

Hi there,

So, I'm about to embark a CMOS modular adventure and I could use some help.

I come from the design world and have limited knowledge of electronics, but am trying my best.

Here's the schematic of my 40106 Clock Generator...


There's nothing special going on here, but I'm not sure how to effectively incorporate LEDs. I found a schematic online for a LED drive that uses a 2N3904 NPN transistor and used it, but I have a sinking feeling that there might exist an IC that contains a couple NPN's that would better suit the project.

A) If I do end up using transistors, can I attach all of their bases to the point before 100k resistor or will I need a 100k resistor for each transistor I use.

B) My design will use 5 LEDs. Is there an IC I could use instead of 5 Transistors?

C) I'm using a 30k resistor here to get a more user friendly range for when the 4.7uF cap is switched on.

D) I'm using the standard .1uF cap for the 40106. Should I attach it close to pin 7 (GND) or pin 14 (9V). Is the 1uF general cap even necessary if I have a power supply with some big caps on it?

Just in case anyone's interested, here's the prototype of the module. It looks a bit like a Doepfer module. I'm hoping to change the potentiometer graphic in the next design.



Thanks for your help![/list]

[-minus-]

Put the 0.1uF cap close to pin 14. Definitely put the 1uF cap there too. I used 100uF on my larger modules, but 10uF might have been sufficient.

My LEDS were super brights with a 20K resistor on them. I didn't bother with the transistors, but it's entirely up to you.

I like that panel! Very nice. How are you producing them?

[trav]